Clearer for the brushes of carpet sweepers



Spt. 16. 1924.

T. DICKINSON CLEARER FOR THE BRUSHES -OF CARPET SWEEPERS Fired June 29 1923 \A. L l

2 Sheets-Sheet, l

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sept. 1s. 1.924. 1,508,542

. T. DlcKlNsoN CLEARER FOR THE BRUSHES OF CARPET SWEEPERS Filed June 29. 1923 2 Sheets-Sheet 2 l Patented Sept. 16, 1924.

TOM DIGKINSON, 0F ACCRINGTN,

GLEARER Fon THE BRUSHES or calamar swnnri'ins.

AApplica, tion filed. A.Tune 29,

To all whom t may concern.'

Be it known that I, ToM DICKINsoN, a British subject, residing at Accrington, county of Lancaster, England, have invented certain new and useful Improvements in Clearers for the Brushes of Carpet Sweepers, of which the following is a specification.

This invention relates to clearers for the rotary brushes of carpet sweepers such as described in the specification of my former British Patent 26003 of 1913 for clearing or removing from the brush, hairs, fibres or threads which have a tendency to lap around the brush.

In that specification I have described an appliance attached to the sweeper case with depending blades to enter ybetween the bristles of the brush as it rotates t'o engage with and sever any hairs or threads lapped thereon.

I find that as there is a certain space between these blades it is possible for hairs to lap and collect between them which are not removed and the object of the present invention is to provide for the more effective clearing of the brush.

According to the invention I give to the plate a longitudinal movement so that the blades will travel longitudinally of the brush and each will engage a wider area of the bristles.

The invention will be fully described with reference to the accompanying drawings.

Fig. l is a longitudinal sectional elevation of carpet sweeper showing the invention applied thereto.

Fig. 2 is a transverse section.

Fig. 3 is a sectional plan with the upper part of the casing removed.

Fig. 4 is a perspective view of the invention detached from the sweeper case.

Figs. 5, 6 and 7 are perspective views of other forms of the blade plate.

Figs. 8 to l1 are transverse sections of the plate and blades showing methods of affixing in position.l

The carpet sweeper is of the ordinary construction with a brush A, rotated by driving wheels B, for delivering the dust into pans or trays C.

The appliance comprises a metal plate or strip E with a number `of blades D stamped therefrom to depend from the top of the sweeper casing and enter between the 1923. serial No. sasoe.

bristles of the brush A for the purpose of severing, cutting or breaking threads, hairs or similar' material which may become lapped round the brush as described in the specification of my former Patent 26003 of 1913.

According to this invention instead of afixing the plate or strip E rigidly to the sweeper casing I so attach or mount it that a to and fro longitudinal movement is imparted thereto to bring the blades D into a di'erent position in relation to the brush as the brush rotates first in one direction and then in the other.

The blades D may be stamped from the metal strip E either from the centre as in Figs. 3 to 6 and 8 to 10 or from the edges as in Fig. 7, or the blades D may be stamped alternately from one side or the other as in Figs. 5 and 11.

I at'present prefer to stamp the blades at an angle to the longitudinal axis of the plate E such as diagonally across it as in Figs. 3 and 4 and 8, and each blade D is preferably made with a notch CZ cut in it to more eifectually take hold of a thread or hair.

The plate E is provided with two or more diagonal slots Gr which engage pins g projecting from the casing or Afrom a block F afiXed to the casing.' The pressure of the brush on the blades as it rotates moves the plate E backwards and forwards and the diagonal inclination of the slots G causes it to move to and fro longitudinally as the brush is rotated rst in one direction and then in the reverse. Thus when the brush sweeps in a forward direction the action on the blades or prongs moves the clearer to one end of its position and when the brush a band or bracket of wire g or metal as in p Figs.l 9 and 10, or otherwise to permit it to move freely.

What .t elaiiiias my invention and desire to protect by Letters Patent iszln a carpet sweeper the combination With the rotary brush and the easing of a clearer depending from the top of the casing and provided with diagonal slots, a plurality of blades depending rom the clearer' to enter between the bristles of the rotary brush and pins projecting from the casing to engage M" ipoepee iii tlie slots and impart a longitudinal nievement to the clearer as the brush rotates.

iii testimony Wliereof l have hereunto set my liand in presence of two subscribing Witmesses this 18 day of June, 1923.

TOM DCKlNS N. l/Vitneeses J. @WDEN OBRIEN, GEORGE H. GBRJEN. 

